APA (7th ed.) Citation

United Nations Environment Programme. (2007). Geo year book 2007: An overview of our changing environment. UNEP.

Chicago Style (17th ed.) Citation

United Nations Environment Programme. Geo Year Book 2007: An Overview of Our Changing Environment. [Nairobi]: UNEP, 2007.

MLA (9th ed.) Citation

United Nations Environment Programme. Geo Year Book 2007: An Overview of Our Changing Environment. UNEP, 2007.

Warning: These citations may not always be 100% accurate.